[@Wernher] Your proximity to me makes me very uncomfortable. Due to your close(ish) ties to the empire. On a side note: armory one is actually useless... because most belts are just that. A belt. And do not form a sphere around the system. So it would be trivial to take an invading fleet over or under the belt and avoid the whole of the traps. It would slow them down a little but not so much that it's even a significant inconvenience. And if it is a spherical belt (which doesn't happen) it would be an impossible task to trap and mine the whole area